CN103245770A - Electroosmosis-vacuum-loading combined consolidometer - Google Patents
Electroosmosis-vacuum-loading combined consolidometer Download PDFInfo
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- CN103245770A CN103245770A CN2013101368641A CN201310136864A CN103245770A CN 103245770 A CN103245770 A CN 103245770A CN 2013101368641 A CN2013101368641 A CN 2013101368641A CN 201310136864 A CN201310136864 A CN 201310136864A CN 103245770 A CN103245770 A CN 103245770A
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Abstract
The invention provides an electroosmosis-vacuum-loading combined consolidometer which comprises a consolidation container, a direct current power supply, a loading system, a vacuum system and a measuring system, wherein an annular circular groove with certain depth is arranged in an upper cover of the consolidation container; a wire guide pipe is arranged at the top of the annular groove; a stainless steel tube with a hole is used as a cathode draining pipe, and is wrapped by geotechnical cloth so as to achieve a back filtering function; a stainless steel bar or carbon rod is used as an anode, and is connected in series by a wire; the draining pipe is arranged at the bottom of the consolidation container, and is connected with a steam-water separating bottle or measuring cylinder through a connecting pipe; and the loading system adopts cylinder-type loading. The electroosmosis-vacuum-loading combined consolidometer is simple to operate, can carry out electroosmosis-vacuum-loading combined or two combined or independent laboratory test research on various soil samples, can be used for monitoring the variation of soil property parameters such as pore pressure, electric potential and settling volume in a consolidation process of the soil samples in real time so as to quantitatively analyze a consolidation effect and provide reliable design parameters for practical engineering application.
Description
Technical field
The present invention relates to the quick solidity test device of a kind of soft clay, belong to Geotechnical Engineering field in the civil engineering work.
Background technology
Along with fast development of national economy, the capital construction of region following the line of the sea is also constantly perfect, and a large amount of soft clay grounds that meanwhile emerge are in need of immediate treatment.Piling prepressing and vacuum method consolidated subsoil are the reinforced soft soil ground methods that adopts usually at present.But soft clay, preloading and vacuum preloading stabilization by drainage poor effect for the glutinous grain of height content, low-permeability.Have in recent years the people with electro-osmosis method and traditional draining concretion method use in conjunction in the reinforcing of soft clay ground, obtained good effect.
Electro-osmosis method is to adopt to insert electrode in the soil body, the pore water in the soil body is moved after applying direct current under electric field action to negative electrode from anode, reaches soil body discharging consolidation purpose.1939, Casagrand was applied to electro-osmosis method in the Geotechnical Engineering for the first time.The various countries scholar has carried out number of research projects in the electric osmose mechanism of reinforcing with application facet afterwards.
But at present to the mechanism of action of electric osmose-vacuum-loadings synergy reinforcing flexible foundation and actual engineering design Study on Problems imperfection also, engineering technical personnel's experience is mainly leaned in construction, thereby has limited applying of this method.
Before the present invention, Chinese patent ZL200810163315.2, CN201210006833.X and CN201210479012.8 successively disclose the laboratory testing rig that is used for reinforced soft soil ground: electroosmosis-load combined consolidometer, vacuum electroosmosis associating consolidometer and compound negative pressure of vacuum reinforcing soft foundation lab simulation analyser.The above two can not consider electric osmose-vacuum-loading three's synergy simultaneously, and the lever load mode can't guarantee to apply vertical constant pressure to soil sample; Latter's complex structure, the cost cost is higher, and compound model is bigger, and single test expends big human and material resources, is not suitable for applying from research electric osmose-vacuum-loading synergy mechanism angle.
Summary of the invention
Be shortcoming or the deficiency that overcomes above-mentioned existing test unit, the invention provides a kind of rotational symmetry electric osmose-vacuum-load combined consolidometer.This invention is simple to operate, cost is low, can carry out electric osmose-vacuum-loading three associating, The combined or the experimental study of effect separately to different soil samples, its configuration of electrodes can be arranged by quadrilateral, hexagon or rotational symmetry mode according to engineering reality or shop experiment needs.Can monitor in real time in the variation of soil nature parameters such as consolidation process mesopore pressure, electromotive force, settling amount soil sample simultaneously, and then the quantitative test consolidation effect, for providing reliable design parameter in actual application in engineering.
Electric osmose-vacuum of the present invention-load combined consolidometer comprises consolidation container, direct supply, loading system, vacuum system and measuring system.It is characterized in that: consolidation container is by the billy body, container upper cover, pressure diaphragm and O-ring seal are formed, consolidation container is placed on the testing table, the drainpipe of billy body bottom is reserved circular hole from testing table and is passed, link to each other with carbonated drink separating bottle or graduated cylinder by connecting pipe, be provided with the negative electrode drainpipe at the billy body axis place of placing soil sample, the place is provided with anode near the bucket wall, the negative electrode drainpipe is connected with direct supply by lead respectively with anode, 4 hole pressure sensors are imbedded in the test soil sample by predefined position, being connected cable on the pressure sensor of hole passes the pressure diaphragm jack and presses display to be connected with the conduit on the container upper cover with the hole, 5 potential measurement probes insert soil sample from the jack on the pressure diaphragm, being connected the conduit that the lead on the potential measurement probe passes on the container upper cover is connected with universal meter, billy body and container upper cover junction parcel one deck O-ring seal, loading system adopts air-cylinder type to load, add carrier gas cylinder by loading steel ball, load cushion block, container upper cover and pressure diaphragm transfer the pressure on the soil sample, and the dial gauge measuring head withstands on and loads on the cushion block.
Described billy body, container upper cover and pressure diaphragm are made by the organic glass of insulation.
Described container cover periphery and center are respectively equipped with toroidal cavity and the circular groove of certain depth; The annular groove external diameter equates with the drum container external diameter, interior span anode 2cm; The toroidal cavity top is provided with conduit, and the circular groove slightly larger in diameter is in negative electrode drainpipe diameter.
Described negative electrode drainpipe adopts stainless-steel tube, every 5mm an osculum is set along its length, and has wrapped up anti-worry effect with geotextile; Anode adopts stainless steel strip or carbon-point, and connects with lead.
Described pressure diaphragm center is provided with the cathode tube jack, is provided with 24 anode jacks on every side, and is provided with 4 hole pressure sensor jacks and 5 electromotive forces measurement holes respectively vertically.
Have scale on the described carbonated drink separating bottle.
The present invention can carry out simple electric osmose as required, simple vacuum, and simple the loading, electric osmose-vacuum combined, electric osmose-Jia is load combined, and vacuum-Jia is load combined, the consolidation test under electric osmose-vacuum-loading synergy and the intermittent energising situation.
Description of drawings
Fig. 1 is single unit system synoptic diagram of the present invention;
Fig. 2 is consolidation container synoptic diagram of the present invention;
Fig. 3 is pressure diaphragm synoptic diagram of the present invention.
Among the figure, 1, consolidation container; 2, testing table; 3, loading frame; 4, air compressor or nitrogen cylinder; 5, add carrier gas cylinder; 6, reduction valve; 7, tensimeter; 8, load steel ball; 9, load cushion block; 10, direct supply; 11, power lead; 12, vacuum pump; 13, vacuum meter; 14, carbonated drink separating bottle; 15, universal meter; 16, potential measurement head; 17, graduated cylinder; 18, display is pressed in the hole; 19, hole piezoelectricity cable; 20, support; 21, dial gauge; 22, connecting pipe; 23, billy body; 24, container upper cover; 25, pressure diaphragm; 26, negative electrode drainpipe; 27, anode; 28, hole pressure sensor; 29, potential measurement probe; 30, O-ring seal; 31, anode connects lead; 32, conduit; 33, drainpipe; 34, negative electrode drainpipe jack; 35, anode jack; 36, pore pressure pipe jack; 37, electromotive force probe jack.
Embodiment
Further specify below in conjunction with accompanying drawing.
As shown in Figure 1, electric osmose-vacuum-load combined consolidometer comprises consolidation container 1, direct supply 10, loading system, vacuum system and measuring system.Loading system adopts cylinder to load, and comprises testing table 2, and loading frame 3 adds carrier gas cylinder 5, air compressor 4, and reduction valve 6, tensimeter 7 loads steel ball 8 and loads cushion block 9.Direct supply 5 is connected 27 with negative electrode drainpipe 26 with anode by lead respectively with conduit.Vacuum system is by vacuum pump 12, and carbonated drink separating bottle 14 and vacuum meter 13 are formed.Measuring system comprises hole pressure sensor 28, and display 18, potential measurement probe 29, universal meter 15, dial gauge 21 and graduated cylinder 17 are pressed in the hole.
As shown in Figure 2, consolidation container 1 is by billy body 23, container upper cover 24, and pressure diaphragm 25 and O-ring seal 30 are formed.Billy body 23, container upper cover 24 and pressure diaphragm 25 adopt the organic glass of insulation to make.Container cover periphery and center are respectively equipped with toroidal cavity and the circular groove of certain depth, and the annular groove external diameter equates with the drum container external diameter, interior span anode 2cm, and the toroidal cavity top is provided with conduit.Billy body center is provided with negative electrode drainpipe 26, and the negative electrode drainpipe adopts stainless-steel tube to be made, and every 5mm an osculum is set along its length, and has wrapped up anti-worry effect with geotextile.The place is provided with anode 27 near the bucket wall, and anode adopts stainless steel strip or carbon-point, and connects with lead 31.
As shown in Figure 3, pressure diaphragm 26 centers are provided with the negative electrode pore, and the periphery is provided with 24 anode jacks, are provided with 4 hole piezoelectricity cable hole and 5 potential measurement probe jacks along axis.
Concrete process of the test is:
(1) consolidation container 1 is placed on the testing table 2, and drainpipe 33 passes from the default circular hole of testing table.With connecting pipe 22 drainpipe 33 is connected with carbonated drink separating bottle 14, if do not carry out vacuum test, then the connecting pipe other end is put into graduated cylinder 17.The negative electrode drainpipe 26 of parcel geotextile is enclosed within on the drainpipe 33 of container body inside;
(2) will test soil sample and pack in the container body, and bury hole pressure sensor 28 underground at ideal position in the process of soil sample of packing into, the placement force dividing plate 25 then, and hole pressure sensor cable passes from pressure diaphragm; Insert stainless steel strip or the carbon-point of testing required radical at the anode jack, and be together in series with lead 31; Insert potential measurement probe 29 to desirable position in the potential measurement hole;
(3) power lead 11 passes conduit with potential measurement lead 16 and is connected with negative electrode drainpipe 26, anode 27 and electromotive force probe 29 respectively.Hole pressure sensor cable is passed other conduit, and the covered container loam cake 24 then, with O-ring seal 30 sealing, and with glass cement sealing duct mouth.
(4) will load cushion block 9 and be placed on the container cover, and place loading steel ball 8; Then dial gauge 21 is fixed on the support 20, the dial gauge measuring head loads the cushion block contact, and the record initial reading.
(5) vacuum pump 12 and carbonated drink separating bottle 14 are connected, connect power supply; Open direct supply 10, transfer to predetermined voltage; Open reduction valve 6 to predetermined pressure, electric osmose-vacuum-loading consolidation test begins.Register hole is pressed display at regular intervals, dial gauge, and the reading on the carbonated drink separating bottle, and measure the electromotive force of each measuring point with universal meter.
Electric osmose-vacuum of the present invention-load combined consolidometer can be carried out simple electric osmose as required, simple vacuum, the simple loading, electric osmose-vacuum combined, electric osmose-Jia is load combined, and vacuum-Jia is load combined, the consolidation test under electric osmose-vacuum-loading synergy and the intermittent energising situation.
Claims (6)
1. electric osmose-vacuum-load combined consolidometer, comprise consolidation container, direct supply, loading system, vacuum system and measuring system, it is characterized in that: consolidation container is by the billy body, container upper cover, pressure diaphragm and O-ring seal are formed, consolidation container is placed on the testing table, the drainpipe of billy body bottom is reserved circular hole from testing table and is passed, link to each other with carbonated drink separating bottle or graduated cylinder by connecting pipe, be provided with the negative electrode drainpipe at the billy body axis place of placing soil sample, the place is provided with anode near the bucket wall, the negative electrode drainpipe is connected with direct supply by lead respectively with anode, 4 hole pressure sensors are imbedded in the test soil sample by predefined position, being connected cable on the pressure sensor of hole passes the pressure diaphragm jack and presses display to be connected with the conduit on the container upper cover with the hole, 5 potential measurement probes insert soil sample from the jack on the pressure diaphragm, being connected the conduit that the lead on the potential measurement probe passes on the container upper cover is connected with universal meter, billy body and container upper cover junction parcel one deck O-ring seal, loading system adopts air-cylinder type to load, add carrier gas cylinder by loading steel ball, load cushion block, container upper cover and pressure diaphragm transfer the pressure on the soil sample, and the dial gauge measuring head withstands on and loads on the cushion block.
2. electric osmose-vacuum according to claim 1-load combined consolidometer is characterized in that: billy body, container upper cover and pressure diaphragm are made by the organic glass of insulation.
3. electric osmose-vacuum according to claim 1-load combined consolidometer is characterized in that: the peripheral and center of container cover is respectively equipped with toroidal cavity and the circular groove of certain depth; The annular groove external diameter equates with the drum container external diameter, interior span anode 2cm; The toroidal cavity top is provided with conduit; The circular groove slightly larger in diameter is in negative electrode drainpipe diameter.
4. electric osmose-vacuum according to claim 1-load combined consolidometer is characterized in that: the negative electrode drainpipe adopts stainless-steel tube, every 5mm an osculum is set along its length, and wraps up with geotextile; Anode adopts stainless steel strip or carbon-point, and connects with lead.
5. electric osmose-vacuum according to claim 1-load combined consolidometer, it is characterized in that: the pressure diaphragm center is provided with the cathode tube jack, is provided with 24 anode jacks on every side, and is provided with 4 cable aperture respectively vertically and 5 electromotive forces measure holes.
6. electric osmose-vacuum according to claim 1-load combined consolidometer is characterized in that: have scale on the carbonated drink separating bottle.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158034A (en) * | 2015-07-31 | 2015-12-16 | 河海大学 | Cohesive soil large-scale triaxial sample consolidating apparatus and consolidating method thereof |
| CN106066297A (en) * | 2016-05-31 | 2016-11-02 | 中国科学院武汉岩土力学研究所 | A kind of indoor soil body electric osmose test hydrogen generating quantity measurement apparatus |
| CN106644668A (en) * | 2016-11-30 | 2017-05-10 | 浙江海洋大学 | Filtering type vacuumizing model bucket device |
| CN106771088A (en) * | 2017-03-13 | 2017-05-31 | 中国矿业大学 | Soil consolidation detector and the detection method of a kind of use counterweight and air pressure combination loading |
| CN108008116A (en) * | 2017-12-06 | 2018-05-08 | 河海大学 | Vacuum heaping pre-compression combines electric osmose experimental rig |
| CN108181197A (en) * | 2018-01-17 | 2018-06-19 | 湖北水总水利水电建设股份有限公司 | It is a kind of for judging to become silted up, the device and method of the best Intervention Timing of sludge soil electric osmose |
| CN108287228A (en) * | 2018-01-31 | 2018-07-17 | 浙江大学 | A kind of device of research electric osmose combined vacuum precompressed deep soil Foundation Treatment Effect |
| CN108693326A (en) * | 2018-03-30 | 2018-10-23 | 南京科兴新材料科技有限公司 | Soil displacement field and the visual experimental rig of seepage field and test method under a kind of simulation dyke building preloading |
| CN110595886A (en) * | 2019-09-11 | 2019-12-20 | 中国电建集团华东勘测设计研究院有限公司 | Model test device and method for researching soft clay thermal consolidation effect |
| CN114878784A (en) * | 2022-05-18 | 2022-08-09 | 江苏科技大学 | Soft soil solidification test device and method |
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| CN106053254A (en) * | 2016-07-07 | 2016-10-26 | 天津城建大学 | Electric osmosis-loading joint shear apparatus |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105158034A (en) * | 2015-07-31 | 2015-12-16 | 河海大学 | Cohesive soil large-scale triaxial sample consolidating apparatus and consolidating method thereof |
| CN106066297B (en) * | 2016-05-31 | 2018-10-12 | 中铁第四勘察设计院集团有限公司 | A kind of interior soil body electric osmose experiment hydrogen generating quantity measuring device |
| CN106066297A (en) * | 2016-05-31 | 2016-11-02 | 中国科学院武汉岩土力学研究所 | A kind of indoor soil body electric osmose test hydrogen generating quantity measurement apparatus |
| CN106644668A (en) * | 2016-11-30 | 2017-05-10 | 浙江海洋大学 | Filtering type vacuumizing model bucket device |
| CN106771088B (en) * | 2017-03-13 | 2019-04-19 | 中国矿业大学 | A kind of soil consolidation detector and detection method using counterweight and air pressure combination loading |
| CN106771088A (en) * | 2017-03-13 | 2017-05-31 | 中国矿业大学 | Soil consolidation detector and the detection method of a kind of use counterweight and air pressure combination loading |
| CN108008116A (en) * | 2017-12-06 | 2018-05-08 | 河海大学 | Vacuum heaping pre-compression combines electric osmose experimental rig |
| CN108181197A (en) * | 2018-01-17 | 2018-06-19 | 湖北水总水利水电建设股份有限公司 | It is a kind of for judging to become silted up, the device and method of the best Intervention Timing of sludge soil electric osmose |
| CN108181197B (en) * | 2018-01-17 | 2023-12-12 | 湖北水总水利水电建设股份有限公司 | Device and method for judging optimal intervention time of silt and sludge electroosmosis |
| CN108287228A (en) * | 2018-01-31 | 2018-07-17 | 浙江大学 | A kind of device of research electric osmose combined vacuum precompressed deep soil Foundation Treatment Effect |
| CN108693326A (en) * | 2018-03-30 | 2018-10-23 | 南京科兴新材料科技有限公司 | Soil displacement field and the visual experimental rig of seepage field and test method under a kind of simulation dyke building preloading |
| CN110595886A (en) * | 2019-09-11 | 2019-12-20 | 中国电建集团华东勘测设计研究院有限公司 | Model test device and method for researching soft clay thermal consolidation effect |
| CN110595886B (en) * | 2019-09-11 | 2021-12-28 | 中国电建集团华东勘测设计研究院有限公司 | Model test device and method for researching soft clay thermal consolidation effect |
| CN114878784A (en) * | 2022-05-18 | 2022-08-09 | 江苏科技大学 | Soft soil solidification test device and method |
| CN114878784B (en) * | 2022-05-18 | 2023-09-22 | 江苏科技大学 | Soft soil solidification test device and method |
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